pom - Eclipse: generador de proyectos Maven que genera NullPointerException al construir el espacio de trabajo

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Question

Estoy usando STS, con la siguiente información de versión

Spring Tool Suite 
Version: 3.7.0.RELEASE
Build Id: 201506290652
Platform: Eclipse Mars (4.5.0)

He importado varios proyectos de Maven. Cuando Eclipse está construyendo automáticamente mi espacio de trabajo, aparecerá este cuadro de diálogo

Errors occurred during the build.
Errors running builder ''Maven Project Builder'' on project ''myproject''.
java.lang.NullPointerException

Cuando miro en mi archivo workspace / .metadata / .log, veo

!ENTRY org.eclipse.core.resources 4 75 2015-07-28 08:40:07.418
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.m2e.core 4 75 2015-07-28 08:40:07.418
!MESSAGE Errors running builder ''Maven Project Builder'' on project ''ebook''.
!STACK 0
java.lang.NullPointerException
        at org.eclipse.wst.common.componentcore.internal.resources.VirtualComponent.setReferences(VirtualComponent.java:501)
        at org.eclipse.m2e.wtp.WebProjectConfiguratorDelegate.setModuleDependencies(WebProjectConfiguratorDelegate.java:282)
        at org.eclipse.m2e.wtp.WTPProjectConfigurator.mavenProjectChanged(WTPProjectConfigurator.java:96)
        at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.mavenProjectChanged(ProjectConfigurationManager.java:1000)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.notifyProjectChangeListeners(ProjectRegistryManager.java:783)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.applyMutableProjectRegistry(ProjectRegistryManager.java:919)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:299)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.getProjectFacade(MavenBuilder.java:154)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:89)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:205)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:245)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:300)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:303)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:359)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:382)
        at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
        at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:235)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

No tengo idea de lo que esto significa o cómo solucionarlo. La ayuda es apreciada, Dave

Answer 1

La eliminación de la carpeta .settings y la reimportación del proyecto Maven resolvió mi problema.